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and really elegant. if steve jobs had been the one to introduce it, people would be going crazy about what a sophisticated and simple tool it is. >> reporter: at the middle school in chapel hill north carolina, rees took us to the pre-algebra classroom where he got up so often to use the sharpener, wall mounted double bird hand cranked. >> we can just go and go and go and i can keep making jokes. >> reporter: he got in trouble for it. it's not as easy as you may remember. it's actually harder than i remember to hold that. >> you have to let the pencil know who is boss. >> reporter: if the wood isn't perfectly straight and the lead perfectly centered. this is very annoying when this happens. >> yeah, right. reporter: then the point may not be on point. >> there's a lot of wood on this side and then as we rotate the pencil, you see that on this side there's more graphite exposed. >> reporter: that's right. he said graphite. not lead. >> this is what happened. in around 1565 in england, shepherds discovered the world's first deposit of nationally occurring graphite. they started using it to m
Search Results 0 to 0 of about 1